1 /* 2 * Copyright © 1997-2003 by The XFree86 Project, Inc. 3 * Copyright © 2007 Dave Airlie 4 * Copyright © 2007-2008 Intel Corporation 5 * Jesse Barnes <jesse.barnes@intel.com> 6 * Copyright 2005-2006 Luc Verhaegen 7 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 * OTHER DEALINGS IN THE SOFTWARE. 26 * 27 * Except as contained in this notice, the name of the copyright holder(s) 28 * and author(s) shall not be used in advertising or otherwise to promote 29 * the sale, use or other dealings in this Software without prior written 30 * authorization from the copyright holder(s) and author(s). 31 */ 32 33 #include <linux/list.h> 34 #include <linux/list_sort.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <video/of_videomode.h> 39 #include <video/videomode.h> 40 #include <drm/drm_modes.h> 41 42 #include "drm_crtc_internal.h" 43 44 /** 45 * drm_mode_debug_printmodeline - print a mode to dmesg 46 * @mode: mode to print 47 * 48 * Describe @mode using DRM_DEBUG. 49 */ 50 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 51 { 52 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " 53 "0x%x 0x%x\n", 54 mode->base.id, mode->name, mode->vrefresh, mode->clock, 55 mode->hdisplay, mode->hsync_start, 56 mode->hsync_end, mode->htotal, 57 mode->vdisplay, mode->vsync_start, 58 mode->vsync_end, mode->vtotal, mode->type, mode->flags); 59 } 60 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 61 62 /** 63 * drm_mode_create - create a new display mode 64 * @dev: DRM device 65 * 66 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 67 * and return it. 68 * 69 * Returns: 70 * Pointer to new mode on success, NULL on error. 71 */ 72 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 73 { 74 struct drm_display_mode *nmode; 75 76 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 77 if (!nmode) 78 return NULL; 79 80 if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) { 81 kfree(nmode); 82 return NULL; 83 } 84 85 return nmode; 86 } 87 EXPORT_SYMBOL(drm_mode_create); 88 89 /** 90 * drm_mode_destroy - remove a mode 91 * @dev: DRM device 92 * @mode: mode to remove 93 * 94 * Release @mode's unique ID, then free it @mode structure itself using kfree. 95 */ 96 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 97 { 98 if (!mode) 99 return; 100 101 drm_mode_object_put(dev, &mode->base); 102 103 kfree(mode); 104 } 105 EXPORT_SYMBOL(drm_mode_destroy); 106 107 /** 108 * drm_mode_probed_add - add a mode to a connector's probed_mode list 109 * @connector: connector the new mode 110 * @mode: mode data 111 * 112 * Add @mode to @connector's probed_mode list for later use. This list should 113 * then in a second step get filtered and all the modes actually supported by 114 * the hardware moved to the @connector's modes list. 115 */ 116 void drm_mode_probed_add(struct drm_connector *connector, 117 struct drm_display_mode *mode) 118 { 119 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 120 121 list_add_tail(&mode->head, &connector->probed_modes); 122 } 123 EXPORT_SYMBOL(drm_mode_probed_add); 124 125 /** 126 * drm_cvt_mode -create a modeline based on the CVT algorithm 127 * @dev: drm device 128 * @hdisplay: hdisplay size 129 * @vdisplay: vdisplay size 130 * @vrefresh: vrefresh rate 131 * @reduced: whether to use reduced blanking 132 * @interlaced: whether to compute an interlaced mode 133 * @margins: whether to add margins (borders) 134 * 135 * This function is called to generate the modeline based on CVT algorithm 136 * according to the hdisplay, vdisplay, vrefresh. 137 * It is based from the VESA(TM) Coordinated Video Timing Generator by 138 * Graham Loveridge April 9, 2003 available at 139 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 140 * 141 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 142 * What I have done is to translate it by using integer calculation. 143 * 144 * Returns: 145 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 146 * The display mode object is allocated with drm_mode_create(). Returns NULL 147 * when no mode could be allocated. 148 */ 149 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 150 int vdisplay, int vrefresh, 151 bool reduced, bool interlaced, bool margins) 152 { 153 #define HV_FACTOR 1000 154 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 155 #define CVT_MARGIN_PERCENTAGE 18 156 /* 2) character cell horizontal granularity (pixels) - default 8 */ 157 #define CVT_H_GRANULARITY 8 158 /* 3) Minimum vertical porch (lines) - default 3 */ 159 #define CVT_MIN_V_PORCH 3 160 /* 4) Minimum number of vertical back porch lines - default 6 */ 161 #define CVT_MIN_V_BPORCH 6 162 /* Pixel Clock step (kHz) */ 163 #define CVT_CLOCK_STEP 250 164 struct drm_display_mode *drm_mode; 165 unsigned int vfieldrate, hperiod; 166 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 167 int interlace; 168 169 /* allocate the drm_display_mode structure. If failure, we will 170 * return directly 171 */ 172 drm_mode = drm_mode_create(dev); 173 if (!drm_mode) 174 return NULL; 175 176 /* the CVT default refresh rate is 60Hz */ 177 if (!vrefresh) 178 vrefresh = 60; 179 180 /* the required field fresh rate */ 181 if (interlaced) 182 vfieldrate = vrefresh * 2; 183 else 184 vfieldrate = vrefresh; 185 186 /* horizontal pixels */ 187 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 188 189 /* determine the left&right borders */ 190 hmargin = 0; 191 if (margins) { 192 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 193 hmargin -= hmargin % CVT_H_GRANULARITY; 194 } 195 /* find the total active pixels */ 196 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 197 198 /* find the number of lines per field */ 199 if (interlaced) 200 vdisplay_rnd = vdisplay / 2; 201 else 202 vdisplay_rnd = vdisplay; 203 204 /* find the top & bottom borders */ 205 vmargin = 0; 206 if (margins) 207 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 208 209 drm_mode->vdisplay = vdisplay + 2 * vmargin; 210 211 /* Interlaced */ 212 if (interlaced) 213 interlace = 1; 214 else 215 interlace = 0; 216 217 /* Determine VSync Width from aspect ratio */ 218 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 219 vsync = 4; 220 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 221 vsync = 5; 222 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 223 vsync = 6; 224 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 225 vsync = 7; 226 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 227 vsync = 7; 228 else /* custom */ 229 vsync = 10; 230 231 if (!reduced) { 232 /* simplify the GTF calculation */ 233 /* 4) Minimum time of vertical sync + back porch interval (µs) 234 * default 550.0 235 */ 236 int tmp1, tmp2; 237 #define CVT_MIN_VSYNC_BP 550 238 /* 3) Nominal HSync width (% of line period) - default 8 */ 239 #define CVT_HSYNC_PERCENTAGE 8 240 unsigned int hblank_percentage; 241 int vsyncandback_porch, vback_porch, hblank; 242 243 /* estimated the horizontal period */ 244 tmp1 = HV_FACTOR * 1000000 - 245 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 246 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 247 interlace; 248 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 249 250 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 251 /* 9. Find number of lines in sync + backporch */ 252 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 253 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 254 else 255 vsyncandback_porch = tmp1; 256 /* 10. Find number of lines in back porch */ 257 vback_porch = vsyncandback_porch - vsync; 258 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 259 vsyncandback_porch + CVT_MIN_V_PORCH; 260 /* 5) Definition of Horizontal blanking time limitation */ 261 /* Gradient (%/kHz) - default 600 */ 262 #define CVT_M_FACTOR 600 263 /* Offset (%) - default 40 */ 264 #define CVT_C_FACTOR 40 265 /* Blanking time scaling factor - default 128 */ 266 #define CVT_K_FACTOR 128 267 /* Scaling factor weighting - default 20 */ 268 #define CVT_J_FACTOR 20 269 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 270 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 271 CVT_J_FACTOR) 272 /* 12. Find ideal blanking duty cycle from formula */ 273 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 274 hperiod / 1000; 275 /* 13. Blanking time */ 276 if (hblank_percentage < 20 * HV_FACTOR) 277 hblank_percentage = 20 * HV_FACTOR; 278 hblank = drm_mode->hdisplay * hblank_percentage / 279 (100 * HV_FACTOR - hblank_percentage); 280 hblank -= hblank % (2 * CVT_H_GRANULARITY); 281 /* 14. find the total pixels per line */ 282 drm_mode->htotal = drm_mode->hdisplay + hblank; 283 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 284 drm_mode->hsync_start = drm_mode->hsync_end - 285 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 286 drm_mode->hsync_start += CVT_H_GRANULARITY - 287 drm_mode->hsync_start % CVT_H_GRANULARITY; 288 /* fill the Vsync values */ 289 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 290 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 291 } else { 292 /* Reduced blanking */ 293 /* Minimum vertical blanking interval time (µs)- default 460 */ 294 #define CVT_RB_MIN_VBLANK 460 295 /* Fixed number of clocks for horizontal sync */ 296 #define CVT_RB_H_SYNC 32 297 /* Fixed number of clocks for horizontal blanking */ 298 #define CVT_RB_H_BLANK 160 299 /* Fixed number of lines for vertical front porch - default 3*/ 300 #define CVT_RB_VFPORCH 3 301 int vbilines; 302 int tmp1, tmp2; 303 /* 8. Estimate Horizontal period. */ 304 tmp1 = HV_FACTOR * 1000000 - 305 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 306 tmp2 = vdisplay_rnd + 2 * vmargin; 307 hperiod = tmp1 / (tmp2 * vfieldrate); 308 /* 9. Find number of lines in vertical blanking */ 309 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 310 /* 10. Check if vertical blanking is sufficient */ 311 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 312 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 313 /* 11. Find total number of lines in vertical field */ 314 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 315 /* 12. Find total number of pixels in a line */ 316 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 317 /* Fill in HSync values */ 318 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 319 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 320 /* Fill in VSync values */ 321 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 322 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 323 } 324 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 325 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; 326 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; 327 /* 18/16. Find actual vertical frame frequency */ 328 /* ignore - just set the mode flag for interlaced */ 329 if (interlaced) { 330 drm_mode->vtotal *= 2; 331 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 332 } 333 /* Fill the mode line name */ 334 drm_mode_set_name(drm_mode); 335 if (reduced) 336 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 337 DRM_MODE_FLAG_NVSYNC); 338 else 339 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 340 DRM_MODE_FLAG_NHSYNC); 341 342 return drm_mode; 343 } 344 EXPORT_SYMBOL(drm_cvt_mode); 345 346 /** 347 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 348 * @dev: drm device 349 * @hdisplay: hdisplay size 350 * @vdisplay: vdisplay size 351 * @vrefresh: vrefresh rate. 352 * @interlaced: whether to compute an interlaced mode 353 * @margins: desired margin (borders) size 354 * @GTF_M: extended GTF formula parameters 355 * @GTF_2C: extended GTF formula parameters 356 * @GTF_K: extended GTF formula parameters 357 * @GTF_2J: extended GTF formula parameters 358 * 359 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 360 * in here multiplied by two. For a C of 40, pass in 80. 361 * 362 * Returns: 363 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 364 * The display mode object is allocated with drm_mode_create(). Returns NULL 365 * when no mode could be allocated. 366 */ 367 struct drm_display_mode * 368 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 369 int vrefresh, bool interlaced, int margins, 370 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 371 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 372 #define GTF_MARGIN_PERCENTAGE 18 373 /* 2) character cell horizontal granularity (pixels) - default 8 */ 374 #define GTF_CELL_GRAN 8 375 /* 3) Minimum vertical porch (lines) - default 3 */ 376 #define GTF_MIN_V_PORCH 1 377 /* width of vsync in lines */ 378 #define V_SYNC_RQD 3 379 /* width of hsync as % of total line */ 380 #define H_SYNC_PERCENT 8 381 /* min time of vsync + back porch (microsec) */ 382 #define MIN_VSYNC_PLUS_BP 550 383 /* C' and M' are part of the Blanking Duty Cycle computation */ 384 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 385 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 386 struct drm_display_mode *drm_mode; 387 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 388 int top_margin, bottom_margin; 389 int interlace; 390 unsigned int hfreq_est; 391 int vsync_plus_bp, vback_porch; 392 unsigned int vtotal_lines, vfieldrate_est, hperiod; 393 unsigned int vfield_rate, vframe_rate; 394 int left_margin, right_margin; 395 unsigned int total_active_pixels, ideal_duty_cycle; 396 unsigned int hblank, total_pixels, pixel_freq; 397 int hsync, hfront_porch, vodd_front_porch_lines; 398 unsigned int tmp1, tmp2; 399 400 drm_mode = drm_mode_create(dev); 401 if (!drm_mode) 402 return NULL; 403 404 /* 1. In order to give correct results, the number of horizontal 405 * pixels requested is first processed to ensure that it is divisible 406 * by the character size, by rounding it to the nearest character 407 * cell boundary: 408 */ 409 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 410 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 411 412 /* 2. If interlace is requested, the number of vertical lines assumed 413 * by the calculation must be halved, as the computation calculates 414 * the number of vertical lines per field. 415 */ 416 if (interlaced) 417 vdisplay_rnd = vdisplay / 2; 418 else 419 vdisplay_rnd = vdisplay; 420 421 /* 3. Find the frame rate required: */ 422 if (interlaced) 423 vfieldrate_rqd = vrefresh * 2; 424 else 425 vfieldrate_rqd = vrefresh; 426 427 /* 4. Find number of lines in Top margin: */ 428 top_margin = 0; 429 if (margins) 430 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 431 1000; 432 /* 5. Find number of lines in bottom margin: */ 433 bottom_margin = top_margin; 434 435 /* 6. If interlace is required, then set variable interlace: */ 436 if (interlaced) 437 interlace = 1; 438 else 439 interlace = 0; 440 441 /* 7. Estimate the Horizontal frequency */ 442 { 443 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 444 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 445 2 + interlace; 446 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 447 } 448 449 /* 8. Find the number of lines in V sync + back porch */ 450 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 451 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 452 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 453 /* 9. Find the number of lines in V back porch alone: */ 454 vback_porch = vsync_plus_bp - V_SYNC_RQD; 455 /* 10. Find the total number of lines in Vertical field period: */ 456 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 457 vsync_plus_bp + GTF_MIN_V_PORCH; 458 /* 11. Estimate the Vertical field frequency: */ 459 vfieldrate_est = hfreq_est / vtotal_lines; 460 /* 12. Find the actual horizontal period: */ 461 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 462 463 /* 13. Find the actual Vertical field frequency: */ 464 vfield_rate = hfreq_est / vtotal_lines; 465 /* 14. Find the Vertical frame frequency: */ 466 if (interlaced) 467 vframe_rate = vfield_rate / 2; 468 else 469 vframe_rate = vfield_rate; 470 /* 15. Find number of pixels in left margin: */ 471 if (margins) 472 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 473 1000; 474 else 475 left_margin = 0; 476 477 /* 16.Find number of pixels in right margin: */ 478 right_margin = left_margin; 479 /* 17.Find total number of active pixels in image and left and right */ 480 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 481 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 482 ideal_duty_cycle = GTF_C_PRIME * 1000 - 483 (GTF_M_PRIME * 1000000 / hfreq_est); 484 /* 19.Find the number of pixels in the blanking time to the nearest 485 * double character cell: */ 486 hblank = total_active_pixels * ideal_duty_cycle / 487 (100000 - ideal_duty_cycle); 488 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 489 hblank = hblank * 2 * GTF_CELL_GRAN; 490 /* 20.Find total number of pixels: */ 491 total_pixels = total_active_pixels + hblank; 492 /* 21.Find pixel clock frequency: */ 493 pixel_freq = total_pixels * hfreq_est / 1000; 494 /* Stage 1 computations are now complete; I should really pass 495 * the results to another function and do the Stage 2 computations, 496 * but I only need a few more values so I'll just append the 497 * computations here for now */ 498 /* 17. Find the number of pixels in the horizontal sync period: */ 499 hsync = H_SYNC_PERCENT * total_pixels / 100; 500 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 501 hsync = hsync * GTF_CELL_GRAN; 502 /* 18. Find the number of pixels in horizontal front porch period */ 503 hfront_porch = hblank / 2 - hsync; 504 /* 36. Find the number of lines in the odd front porch period: */ 505 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 506 507 /* finally, pack the results in the mode struct */ 508 drm_mode->hdisplay = hdisplay_rnd; 509 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 510 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 511 drm_mode->htotal = total_pixels; 512 drm_mode->vdisplay = vdisplay_rnd; 513 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 514 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 515 drm_mode->vtotal = vtotal_lines; 516 517 drm_mode->clock = pixel_freq; 518 519 if (interlaced) { 520 drm_mode->vtotal *= 2; 521 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 522 } 523 524 drm_mode_set_name(drm_mode); 525 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 526 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 527 else 528 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 529 530 return drm_mode; 531 } 532 EXPORT_SYMBOL(drm_gtf_mode_complex); 533 534 /** 535 * drm_gtf_mode - create the modeline based on the GTF algorithm 536 * @dev: drm device 537 * @hdisplay: hdisplay size 538 * @vdisplay: vdisplay size 539 * @vrefresh: vrefresh rate. 540 * @interlaced: whether to compute an interlaced mode 541 * @margins: desired margin (borders) size 542 * 543 * return the modeline based on GTF algorithm 544 * 545 * This function is to create the modeline based on the GTF algorithm. 546 * Generalized Timing Formula is derived from: 547 * GTF Spreadsheet by Andy Morrish (1/5/97) 548 * available at http://www.vesa.org 549 * 550 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 551 * What I have done is to translate it by using integer calculation. 552 * I also refer to the function of fb_get_mode in the file of 553 * drivers/video/fbmon.c 554 * 555 * Standard GTF parameters: 556 * M = 600 557 * C = 40 558 * K = 128 559 * J = 20 560 * 561 * Returns: 562 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 563 * The display mode object is allocated with drm_mode_create(). Returns NULL 564 * when no mode could be allocated. 565 */ 566 struct drm_display_mode * 567 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 568 bool interlaced, int margins) 569 { 570 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 571 interlaced, margins, 572 600, 40 * 2, 128, 20 * 2); 573 } 574 EXPORT_SYMBOL(drm_gtf_mode); 575 576 #ifdef CONFIG_VIDEOMODE_HELPERS 577 /** 578 * drm_display_mode_from_videomode - fill in @dmode using @vm, 579 * @vm: videomode structure to use as source 580 * @dmode: drm_display_mode structure to use as destination 581 * 582 * Fills out @dmode using the display mode specified in @vm. 583 */ 584 void drm_display_mode_from_videomode(const struct videomode *vm, 585 struct drm_display_mode *dmode) 586 { 587 dmode->hdisplay = vm->hactive; 588 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 589 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 590 dmode->htotal = dmode->hsync_end + vm->hback_porch; 591 592 dmode->vdisplay = vm->vactive; 593 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 594 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 595 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 596 597 dmode->clock = vm->pixelclock / 1000; 598 599 dmode->flags = 0; 600 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 601 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 602 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 603 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 604 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 605 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 606 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 607 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 608 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 609 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 610 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 611 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 612 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 613 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 614 drm_mode_set_name(dmode); 615 } 616 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 617 618 /** 619 * drm_display_mode_to_videomode - fill in @vm using @dmode, 620 * @dmode: drm_display_mode structure to use as source 621 * @vm: videomode structure to use as destination 622 * 623 * Fills out @vm using the display mode specified in @dmode. 624 */ 625 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 626 struct videomode *vm) 627 { 628 vm->hactive = dmode->hdisplay; 629 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 630 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 631 vm->hback_porch = dmode->htotal - dmode->hsync_end; 632 633 vm->vactive = dmode->vdisplay; 634 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 635 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 636 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 637 638 vm->pixelclock = dmode->clock * 1000; 639 640 vm->flags = 0; 641 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 642 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 643 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 644 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 645 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 646 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 647 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 648 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 649 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 650 vm->flags |= DISPLAY_FLAGS_INTERLACED; 651 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 652 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 653 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 654 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 655 } 656 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 657 658 #ifdef CONFIG_OF 659 /** 660 * of_get_drm_display_mode - get a drm_display_mode from devicetree 661 * @np: device_node with the timing specification 662 * @dmode: will be set to the return value 663 * @index: index into the list of display timings in devicetree 664 * 665 * This function is expensive and should only be used, if only one mode is to be 666 * read from DT. To get multiple modes start with of_get_display_timings and 667 * work with that instead. 668 * 669 * Returns: 670 * 0 on success, a negative errno code when no of videomode node was found. 671 */ 672 int of_get_drm_display_mode(struct device_node *np, 673 struct drm_display_mode *dmode, int index) 674 { 675 struct videomode vm; 676 int ret; 677 678 ret = of_get_videomode(np, &vm, index); 679 if (ret) 680 return ret; 681 682 drm_display_mode_from_videomode(&vm, dmode); 683 684 pr_debug("%s: got %dx%d display mode from %s\n", 685 of_node_full_name(np), vm.hactive, vm.vactive, np->name); 686 drm_mode_debug_printmodeline(dmode); 687 688 return 0; 689 } 690 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 691 #endif /* CONFIG_OF */ 692 #endif /* CONFIG_VIDEOMODE_HELPERS */ 693 694 /** 695 * drm_mode_set_name - set the name on a mode 696 * @mode: name will be set in this mode 697 * 698 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 699 * with an optional 'i' suffix for interlaced modes. 700 */ 701 void drm_mode_set_name(struct drm_display_mode *mode) 702 { 703 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 704 705 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 706 mode->hdisplay, mode->vdisplay, 707 interlaced ? "i" : ""); 708 } 709 EXPORT_SYMBOL(drm_mode_set_name); 710 711 /** 712 * drm_mode_hsync - get the hsync of a mode 713 * @mode: mode 714 * 715 * Returns: 716 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the 717 * value first if it is not yet set. 718 */ 719 int drm_mode_hsync(const struct drm_display_mode *mode) 720 { 721 unsigned int calc_val; 722 723 if (mode->hsync) 724 return mode->hsync; 725 726 if (mode->htotal < 0) 727 return 0; 728 729 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 730 calc_val += 500; /* round to 1000Hz */ 731 calc_val /= 1000; /* truncate to kHz */ 732 733 return calc_val; 734 } 735 EXPORT_SYMBOL(drm_mode_hsync); 736 737 /** 738 * drm_mode_vrefresh - get the vrefresh of a mode 739 * @mode: mode 740 * 741 * Returns: 742 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 743 * value first if it is not yet set. 744 */ 745 int drm_mode_vrefresh(const struct drm_display_mode *mode) 746 { 747 int refresh = 0; 748 unsigned int calc_val; 749 750 if (mode->vrefresh > 0) 751 refresh = mode->vrefresh; 752 else if (mode->htotal > 0 && mode->vtotal > 0) { 753 int vtotal; 754 vtotal = mode->vtotal; 755 /* work out vrefresh the value will be x1000 */ 756 calc_val = (mode->clock * 1000); 757 calc_val /= mode->htotal; 758 refresh = (calc_val + vtotal / 2) / vtotal; 759 760 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 761 refresh *= 2; 762 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 763 refresh /= 2; 764 if (mode->vscan > 1) 765 refresh /= mode->vscan; 766 } 767 return refresh; 768 } 769 EXPORT_SYMBOL(drm_mode_vrefresh); 770 771 /** 772 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 773 * @p: mode 774 * @adjust_flags: a combination of adjustment flags 775 * 776 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 777 * 778 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 779 * interlaced modes. 780 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 781 * buffers containing two eyes (only adjust the timings when needed, eg. for 782 * "frame packing" or "side by side full"). 783 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 784 * be performed for doublescan and vscan > 1 modes respectively. 785 */ 786 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 787 { 788 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) 789 return; 790 791 p->crtc_clock = p->clock; 792 p->crtc_hdisplay = p->hdisplay; 793 p->crtc_hsync_start = p->hsync_start; 794 p->crtc_hsync_end = p->hsync_end; 795 p->crtc_htotal = p->htotal; 796 p->crtc_hskew = p->hskew; 797 p->crtc_vdisplay = p->vdisplay; 798 p->crtc_vsync_start = p->vsync_start; 799 p->crtc_vsync_end = p->vsync_end; 800 p->crtc_vtotal = p->vtotal; 801 802 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 803 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 804 p->crtc_vdisplay /= 2; 805 p->crtc_vsync_start /= 2; 806 p->crtc_vsync_end /= 2; 807 p->crtc_vtotal /= 2; 808 } 809 } 810 811 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 812 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 813 p->crtc_vdisplay *= 2; 814 p->crtc_vsync_start *= 2; 815 p->crtc_vsync_end *= 2; 816 p->crtc_vtotal *= 2; 817 } 818 } 819 820 if (!(adjust_flags & CRTC_NO_VSCAN)) { 821 if (p->vscan > 1) { 822 p->crtc_vdisplay *= p->vscan; 823 p->crtc_vsync_start *= p->vscan; 824 p->crtc_vsync_end *= p->vscan; 825 p->crtc_vtotal *= p->vscan; 826 } 827 } 828 829 if (adjust_flags & CRTC_STEREO_DOUBLE) { 830 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 831 832 switch (layout) { 833 case DRM_MODE_FLAG_3D_FRAME_PACKING: 834 p->crtc_clock *= 2; 835 p->crtc_vdisplay += p->crtc_vtotal; 836 p->crtc_vsync_start += p->crtc_vtotal; 837 p->crtc_vsync_end += p->crtc_vtotal; 838 p->crtc_vtotal += p->crtc_vtotal; 839 break; 840 } 841 } 842 843 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 844 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 845 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 846 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 847 } 848 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 849 850 /** 851 * drm_mode_copy - copy the mode 852 * @dst: mode to overwrite 853 * @src: mode to copy 854 * 855 * Copy an existing mode into another mode, preserving the object id and 856 * list head of the destination mode. 857 */ 858 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 859 { 860 int id = dst->base.id; 861 struct list_head head = dst->head; 862 863 *dst = *src; 864 dst->base.id = id; 865 dst->head = head; 866 } 867 EXPORT_SYMBOL(drm_mode_copy); 868 869 /** 870 * drm_mode_duplicate - allocate and duplicate an existing mode 871 * @dev: drm_device to allocate the duplicated mode for 872 * @mode: mode to duplicate 873 * 874 * Just allocate a new mode, copy the existing mode into it, and return 875 * a pointer to it. Used to create new instances of established modes. 876 * 877 * Returns: 878 * Pointer to duplicated mode on success, NULL on error. 879 */ 880 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 881 const struct drm_display_mode *mode) 882 { 883 struct drm_display_mode *nmode; 884 885 nmode = drm_mode_create(dev); 886 if (!nmode) 887 return NULL; 888 889 drm_mode_copy(nmode, mode); 890 891 return nmode; 892 } 893 EXPORT_SYMBOL(drm_mode_duplicate); 894 895 /** 896 * drm_mode_equal - test modes for equality 897 * @mode1: first mode 898 * @mode2: second mode 899 * 900 * Check to see if @mode1 and @mode2 are equivalent. 901 * 902 * Returns: 903 * True if the modes are equal, false otherwise. 904 */ 905 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 906 { 907 if (!mode1 && !mode2) 908 return true; 909 910 if (!mode1 || !mode2) 911 return false; 912 913 /* do clock check convert to PICOS so fb modes get matched 914 * the same */ 915 if (mode1->clock && mode2->clock) { 916 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) 917 return false; 918 } else if (mode1->clock != mode2->clock) 919 return false; 920 921 return drm_mode_equal_no_clocks(mode1, mode2); 922 } 923 EXPORT_SYMBOL(drm_mode_equal); 924 925 /** 926 * drm_mode_equal_no_clocks - test modes for equality 927 * @mode1: first mode 928 * @mode2: second mode 929 * 930 * Check to see if @mode1 and @mode2 are equivalent, but 931 * don't check the pixel clocks. 932 * 933 * Returns: 934 * True if the modes are equal, false otherwise. 935 */ 936 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 937 { 938 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != 939 (mode2->flags & DRM_MODE_FLAG_3D_MASK)) 940 return false; 941 942 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); 943 } 944 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 945 946 /** 947 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 948 * @mode1: first mode 949 * @mode2: second mode 950 * 951 * Check to see if @mode1 and @mode2 are equivalent, but 952 * don't check the pixel clocks nor the stereo layout. 953 * 954 * Returns: 955 * True if the modes are equal, false otherwise. 956 */ 957 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 958 const struct drm_display_mode *mode2) 959 { 960 if (mode1->hdisplay == mode2->hdisplay && 961 mode1->hsync_start == mode2->hsync_start && 962 mode1->hsync_end == mode2->hsync_end && 963 mode1->htotal == mode2->htotal && 964 mode1->hskew == mode2->hskew && 965 mode1->vdisplay == mode2->vdisplay && 966 mode1->vsync_start == mode2->vsync_start && 967 mode1->vsync_end == mode2->vsync_end && 968 mode1->vtotal == mode2->vtotal && 969 mode1->vscan == mode2->vscan && 970 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 971 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) 972 return true; 973 974 return false; 975 } 976 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 977 978 /** 979 * drm_mode_validate_basic - make sure the mode is somewhat sane 980 * @mode: mode to check 981 * 982 * Check that the mode timings are at least somewhat reasonable. 983 * Any hardware specific limits are left up for each driver to check. 984 * 985 * Returns: 986 * The mode status 987 */ 988 enum drm_mode_status 989 drm_mode_validate_basic(const struct drm_display_mode *mode) 990 { 991 if (mode->clock == 0) 992 return MODE_CLOCK_LOW; 993 994 if (mode->hdisplay == 0 || 995 mode->hsync_start < mode->hdisplay || 996 mode->hsync_end < mode->hsync_start || 997 mode->htotal < mode->hsync_end) 998 return MODE_H_ILLEGAL; 999 1000 if (mode->vdisplay == 0 || 1001 mode->vsync_start < mode->vdisplay || 1002 mode->vsync_end < mode->vsync_start || 1003 mode->vtotal < mode->vsync_end) 1004 return MODE_V_ILLEGAL; 1005 1006 return MODE_OK; 1007 } 1008 EXPORT_SYMBOL(drm_mode_validate_basic); 1009 1010 /** 1011 * drm_mode_validate_size - make sure modes adhere to size constraints 1012 * @mode: mode to check 1013 * @maxX: maximum width 1014 * @maxY: maximum height 1015 * 1016 * This function is a helper which can be used to validate modes against size 1017 * limitations of the DRM device/connector. If a mode is too big its status 1018 * member is updated with the appropriate validation failure code. The list 1019 * itself is not changed. 1020 * 1021 * Returns: 1022 * The mode status 1023 */ 1024 enum drm_mode_status 1025 drm_mode_validate_size(const struct drm_display_mode *mode, 1026 int maxX, int maxY) 1027 { 1028 if (maxX > 0 && mode->hdisplay > maxX) 1029 return MODE_VIRTUAL_X; 1030 1031 if (maxY > 0 && mode->vdisplay > maxY) 1032 return MODE_VIRTUAL_Y; 1033 1034 return MODE_OK; 1035 } 1036 EXPORT_SYMBOL(drm_mode_validate_size); 1037 1038 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1039 1040 static const char * const drm_mode_status_names[] = { 1041 MODE_STATUS(OK), 1042 MODE_STATUS(HSYNC), 1043 MODE_STATUS(VSYNC), 1044 MODE_STATUS(H_ILLEGAL), 1045 MODE_STATUS(V_ILLEGAL), 1046 MODE_STATUS(BAD_WIDTH), 1047 MODE_STATUS(NOMODE), 1048 MODE_STATUS(NO_INTERLACE), 1049 MODE_STATUS(NO_DBLESCAN), 1050 MODE_STATUS(NO_VSCAN), 1051 MODE_STATUS(MEM), 1052 MODE_STATUS(VIRTUAL_X), 1053 MODE_STATUS(VIRTUAL_Y), 1054 MODE_STATUS(MEM_VIRT), 1055 MODE_STATUS(NOCLOCK), 1056 MODE_STATUS(CLOCK_HIGH), 1057 MODE_STATUS(CLOCK_LOW), 1058 MODE_STATUS(CLOCK_RANGE), 1059 MODE_STATUS(BAD_HVALUE), 1060 MODE_STATUS(BAD_VVALUE), 1061 MODE_STATUS(BAD_VSCAN), 1062 MODE_STATUS(HSYNC_NARROW), 1063 MODE_STATUS(HSYNC_WIDE), 1064 MODE_STATUS(HBLANK_NARROW), 1065 MODE_STATUS(HBLANK_WIDE), 1066 MODE_STATUS(VSYNC_NARROW), 1067 MODE_STATUS(VSYNC_WIDE), 1068 MODE_STATUS(VBLANK_NARROW), 1069 MODE_STATUS(VBLANK_WIDE), 1070 MODE_STATUS(PANEL), 1071 MODE_STATUS(INTERLACE_WIDTH), 1072 MODE_STATUS(ONE_WIDTH), 1073 MODE_STATUS(ONE_HEIGHT), 1074 MODE_STATUS(ONE_SIZE), 1075 MODE_STATUS(NO_REDUCED), 1076 MODE_STATUS(NO_STEREO), 1077 MODE_STATUS(STALE), 1078 MODE_STATUS(BAD), 1079 MODE_STATUS(ERROR), 1080 }; 1081 1082 #undef MODE_STATUS 1083 1084 static const char *drm_get_mode_status_name(enum drm_mode_status status) 1085 { 1086 int index = status + 3; 1087 1088 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1089 return ""; 1090 1091 return drm_mode_status_names[index]; 1092 } 1093 1094 /** 1095 * drm_mode_prune_invalid - remove invalid modes from mode list 1096 * @dev: DRM device 1097 * @mode_list: list of modes to check 1098 * @verbose: be verbose about it 1099 * 1100 * This helper function can be used to prune a display mode list after 1101 * validation has been completed. All modes who's status is not MODE_OK will be 1102 * removed from the list, and if @verbose the status code and mode name is also 1103 * printed to dmesg. 1104 */ 1105 void drm_mode_prune_invalid(struct drm_device *dev, 1106 struct list_head *mode_list, bool verbose) 1107 { 1108 struct drm_display_mode *mode, *t; 1109 1110 list_for_each_entry_safe(mode, t, mode_list, head) { 1111 if (mode->status != MODE_OK) { 1112 list_del(&mode->head); 1113 if (verbose) { 1114 drm_mode_debug_printmodeline(mode); 1115 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1116 mode->name, 1117 drm_get_mode_status_name(mode->status)); 1118 } 1119 drm_mode_destroy(dev, mode); 1120 } 1121 } 1122 } 1123 EXPORT_SYMBOL(drm_mode_prune_invalid); 1124 1125 /** 1126 * drm_mode_compare - compare modes for favorability 1127 * @priv: unused 1128 * @lh_a: list_head for first mode 1129 * @lh_b: list_head for second mode 1130 * 1131 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1132 * which is better. 1133 * 1134 * Returns: 1135 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1136 * positive if @lh_b is better than @lh_a. 1137 */ 1138 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1139 { 1140 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1141 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1142 int diff; 1143 1144 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1145 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1146 if (diff) 1147 return diff; 1148 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1149 if (diff) 1150 return diff; 1151 1152 diff = b->vrefresh - a->vrefresh; 1153 if (diff) 1154 return diff; 1155 1156 diff = b->clock - a->clock; 1157 return diff; 1158 } 1159 1160 /** 1161 * drm_mode_sort - sort mode list 1162 * @mode_list: list of drm_display_mode structures to sort 1163 * 1164 * Sort @mode_list by favorability, moving good modes to the head of the list. 1165 */ 1166 void drm_mode_sort(struct list_head *mode_list) 1167 { 1168 list_sort(NULL, mode_list, drm_mode_compare); 1169 } 1170 EXPORT_SYMBOL(drm_mode_sort); 1171 1172 /** 1173 * drm_mode_connector_list_update - update the mode list for the connector 1174 * @connector: the connector to update 1175 * 1176 * This moves the modes from the @connector probed_modes list 1177 * to the actual mode list. It compares the probed mode against the current 1178 * list and only adds different/new modes. 1179 * 1180 * This is just a helper functions doesn't validate any modes itself and also 1181 * doesn't prune any invalid modes. Callers need to do that themselves. 1182 */ 1183 void drm_mode_connector_list_update(struct drm_connector *connector) 1184 { 1185 struct drm_display_mode *pmode, *pt; 1186 1187 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1188 1189 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1190 struct drm_display_mode *mode; 1191 bool found_it = false; 1192 1193 /* go through current modes checking for the new probed mode */ 1194 list_for_each_entry(mode, &connector->modes, head) { 1195 if (!drm_mode_equal(pmode, mode)) 1196 continue; 1197 1198 found_it = true; 1199 1200 /* 1201 * If the old matching mode is stale (ie. left over 1202 * from a previous probe) just replace it outright. 1203 * Otherwise just merge the type bits between all 1204 * equal probed modes. 1205 * 1206 * If two probed modes are considered equal, pick the 1207 * actual timings from the one that's marked as 1208 * preferred (in case the match isn't 100%). If 1209 * multiple or zero preferred modes are present, favor 1210 * the mode added to the probed_modes list first. 1211 */ 1212 if (mode->status == MODE_STALE) { 1213 drm_mode_copy(mode, pmode); 1214 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1215 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1216 pmode->type |= mode->type; 1217 drm_mode_copy(mode, pmode); 1218 } else { 1219 mode->type |= pmode->type; 1220 } 1221 1222 list_del(&pmode->head); 1223 drm_mode_destroy(connector->dev, pmode); 1224 break; 1225 } 1226 1227 if (!found_it) { 1228 list_move_tail(&pmode->head, &connector->modes); 1229 } 1230 } 1231 } 1232 EXPORT_SYMBOL(drm_mode_connector_list_update); 1233 1234 /** 1235 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1236 * @mode_option: optional per connector mode option 1237 * @connector: connector to parse modeline for 1238 * @mode: preallocated drm_cmdline_mode structure to fill out 1239 * 1240 * This parses @mode_option command line modeline for modes and options to 1241 * configure the connector. If @mode_option is NULL the default command line 1242 * modeline in fb_mode_option will be parsed instead. 1243 * 1244 * This uses the same parameters as the fb modedb.c, except for an extra 1245 * force-enable, force-enable-digital and force-disable bit at the end: 1246 * 1247 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1248 * 1249 * The intermediate drm_cmdline_mode structure is required to store additional 1250 * options from the command line modline like the force-enable/disable flag. 1251 * 1252 * Returns: 1253 * True if a valid modeline has been parsed, false otherwise. 1254 */ 1255 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1256 struct drm_connector *connector, 1257 struct drm_cmdline_mode *mode) 1258 { 1259 const char *name; 1260 unsigned int namelen; 1261 bool res_specified = false, bpp_specified = false, refresh_specified = false; 1262 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 1263 bool yres_specified = false, cvt = false, rb = false; 1264 bool interlace = false, margins = false, was_digit = false; 1265 int i; 1266 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 1267 1268 #ifdef CONFIG_FB 1269 if (!mode_option) 1270 mode_option = fb_mode_option; 1271 #endif 1272 1273 if (!mode_option) { 1274 mode->specified = false; 1275 return false; 1276 } 1277 1278 name = mode_option; 1279 namelen = strlen(name); 1280 for (i = namelen-1; i >= 0; i--) { 1281 switch (name[i]) { 1282 case '@': 1283 if (!refresh_specified && !bpp_specified && 1284 !yres_specified && !cvt && !rb && was_digit) { 1285 refresh = simple_strtol(&name[i+1], NULL, 10); 1286 refresh_specified = true; 1287 was_digit = false; 1288 } else 1289 goto done; 1290 break; 1291 case '-': 1292 if (!bpp_specified && !yres_specified && !cvt && 1293 !rb && was_digit) { 1294 bpp = simple_strtol(&name[i+1], NULL, 10); 1295 bpp_specified = true; 1296 was_digit = false; 1297 } else 1298 goto done; 1299 break; 1300 case 'x': 1301 if (!yres_specified && was_digit) { 1302 yres = simple_strtol(&name[i+1], NULL, 10); 1303 yres_specified = true; 1304 was_digit = false; 1305 } else 1306 goto done; 1307 break; 1308 case '0' ... '9': 1309 was_digit = true; 1310 break; 1311 case 'M': 1312 if (yres_specified || cvt || was_digit) 1313 goto done; 1314 cvt = true; 1315 break; 1316 case 'R': 1317 if (yres_specified || cvt || rb || was_digit) 1318 goto done; 1319 rb = true; 1320 break; 1321 case 'm': 1322 if (cvt || yres_specified || was_digit) 1323 goto done; 1324 margins = true; 1325 break; 1326 case 'i': 1327 if (cvt || yres_specified || was_digit) 1328 goto done; 1329 interlace = true; 1330 break; 1331 case 'e': 1332 if (yres_specified || bpp_specified || refresh_specified || 1333 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1334 goto done; 1335 1336 force = DRM_FORCE_ON; 1337 break; 1338 case 'D': 1339 if (yres_specified || bpp_specified || refresh_specified || 1340 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1341 goto done; 1342 1343 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1344 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1345 force = DRM_FORCE_ON; 1346 else 1347 force = DRM_FORCE_ON_DIGITAL; 1348 break; 1349 case 'd': 1350 if (yres_specified || bpp_specified || refresh_specified || 1351 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1352 goto done; 1353 1354 force = DRM_FORCE_OFF; 1355 break; 1356 default: 1357 goto done; 1358 } 1359 } 1360 1361 if (i < 0 && yres_specified) { 1362 char *ch; 1363 xres = simple_strtol(name, &ch, 10); 1364 if ((ch != NULL) && (*ch == 'x')) 1365 res_specified = true; 1366 else 1367 i = ch - name; 1368 } else if (!yres_specified && was_digit) { 1369 /* catch mode that begins with digits but has no 'x' */ 1370 i = 0; 1371 } 1372 done: 1373 if (i >= 0) { 1374 printk(KERN_WARNING 1375 "parse error at position %i in video mode '%s'\n", 1376 i, name); 1377 mode->specified = false; 1378 return false; 1379 } 1380 1381 if (res_specified) { 1382 mode->specified = true; 1383 mode->xres = xres; 1384 mode->yres = yres; 1385 } 1386 1387 if (refresh_specified) { 1388 mode->refresh_specified = true; 1389 mode->refresh = refresh; 1390 } 1391 1392 if (bpp_specified) { 1393 mode->bpp_specified = true; 1394 mode->bpp = bpp; 1395 } 1396 mode->rb = rb; 1397 mode->cvt = cvt; 1398 mode->interlace = interlace; 1399 mode->margins = margins; 1400 mode->force = force; 1401 1402 return true; 1403 } 1404 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1405 1406 /** 1407 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1408 * @dev: DRM device to create the new mode for 1409 * @cmd: input command line modeline 1410 * 1411 * Returns: 1412 * Pointer to converted mode on success, NULL on error. 1413 */ 1414 struct drm_display_mode * 1415 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1416 struct drm_cmdline_mode *cmd) 1417 { 1418 struct drm_display_mode *mode; 1419 1420 if (cmd->cvt) 1421 mode = drm_cvt_mode(dev, 1422 cmd->xres, cmd->yres, 1423 cmd->refresh_specified ? cmd->refresh : 60, 1424 cmd->rb, cmd->interlace, 1425 cmd->margins); 1426 else 1427 mode = drm_gtf_mode(dev, 1428 cmd->xres, cmd->yres, 1429 cmd->refresh_specified ? cmd->refresh : 60, 1430 cmd->interlace, 1431 cmd->margins); 1432 if (!mode) 1433 return NULL; 1434 1435 mode->type |= DRM_MODE_TYPE_USERDEF; 1436 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1437 return mode; 1438 } 1439 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1440 1441 /** 1442 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1443 * @out: drm_mode_modeinfo struct to return to the user 1444 * @in: drm_display_mode to use 1445 * 1446 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1447 * the user. 1448 */ 1449 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1450 const struct drm_display_mode *in) 1451 { 1452 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1453 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1454 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1455 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1456 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1457 "timing values too large for mode info\n"); 1458 1459 out->clock = in->clock; 1460 out->hdisplay = in->hdisplay; 1461 out->hsync_start = in->hsync_start; 1462 out->hsync_end = in->hsync_end; 1463 out->htotal = in->htotal; 1464 out->hskew = in->hskew; 1465 out->vdisplay = in->vdisplay; 1466 out->vsync_start = in->vsync_start; 1467 out->vsync_end = in->vsync_end; 1468 out->vtotal = in->vtotal; 1469 out->vscan = in->vscan; 1470 out->vrefresh = in->vrefresh; 1471 out->flags = in->flags; 1472 out->type = in->type; 1473 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1474 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1475 } 1476 1477 /** 1478 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1479 * @out: drm_display_mode to return to the user 1480 * @in: drm_mode_modeinfo to use 1481 * 1482 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1483 * the caller. 1484 * 1485 * Returns: 1486 * Zero on success, negative errno on failure. 1487 */ 1488 int drm_mode_convert_umode(struct drm_display_mode *out, 1489 const struct drm_mode_modeinfo *in) 1490 { 1491 int ret = -EINVAL; 1492 1493 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) { 1494 ret = -ERANGE; 1495 goto out; 1496 } 1497 1498 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1499 goto out; 1500 1501 out->clock = in->clock; 1502 out->hdisplay = in->hdisplay; 1503 out->hsync_start = in->hsync_start; 1504 out->hsync_end = in->hsync_end; 1505 out->htotal = in->htotal; 1506 out->hskew = in->hskew; 1507 out->vdisplay = in->vdisplay; 1508 out->vsync_start = in->vsync_start; 1509 out->vsync_end = in->vsync_end; 1510 out->vtotal = in->vtotal; 1511 out->vscan = in->vscan; 1512 out->vrefresh = in->vrefresh; 1513 out->flags = in->flags; 1514 out->type = in->type; 1515 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1516 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1517 1518 out->status = drm_mode_validate_basic(out); 1519 if (out->status != MODE_OK) 1520 goto out; 1521 1522 ret = 0; 1523 1524 out: 1525 return ret; 1526 } 1527